Suppose the gravitational force of the Earth on a body was 
. What escape velocity ve would a body need to escape the gravitational field of the Earth?
A.
.B.
.C.
.D.
.E.
.Answer: B
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How many types of fundamental particles exist?
A.) 6. B.) 12. C.) 24. D.) 30. E.) 300.
If ? = 40°, ? = 60°, and M = 4.0 kg, determine the tension in string 1.
A. 15 N B. 22 N C. 17 N D. 20 N E. 36 N
The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed up out of the page, the direction of the magnetic field at P is closest to the direction of
A. E. B. F. C. G. D. H. E. A.
A machinist needs to punch a 5.0-cm-radius hole in a steel plate which is 0.45 cm thick. If the ultimate shear strength of steel is 2.50 × 10^8 Pa, what is the force required to accomplish this task?
a. 8.8E+5 N b. 3.5E+5 N c. 5.6E+6 N d. 1.1E+8 N